| Patents for G01V 3 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation (25,929) |
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| 10/31/1984 | EP0122932A1 Well logging sleeve and method for making same. |
| 10/30/1984 | US4480227 Portable pulsed NMR instrument and method of use |
| 10/30/1984 | CA1177120A1 Method for determining distance and direction from an open well to a cased well using resistivity and directional survey data |
| 10/30/1984 | CA1176972A1 Logging method and apparatus using a sonde equipped with measuring pads |
| 10/25/1984 | WO1984004173A1 Baggage inspection apparatus and method for determining the presence of explosives |
| 10/24/1984 | EP0122899A2 Apparatus and method employing extraneous field compensation for locating current-carrying objects |
| 10/24/1984 | EP0122729A1 Copy machine with document dependent control |
| 10/16/1984 | CA1176343A1 Method and electrically conductive wire for detecting the location of electrically insulative continuous item laid under ground |
| 10/16/1984 | CA1176309A1 Well logging method using electron spin resonance signals from hydrocarbon crude |
| 10/10/1984 | EP0121360A2 Electromagnetic borehole logging apparatus and method |
| 10/10/1984 | EP0121359A2 Electromagnetic borehole logging apparatus and method |
| 10/03/1984 | EP0120260A2 Magnetic field sensor and position sensor incorporating a magnetic field sensor |
| 10/03/1984 | EP0120091A1 Apparatus and method for logging wells while drilling |
| 10/02/1984 | CA1175485A1 Computer-controlled, portable pulsed nmr instrument |
| 10/02/1984 | CA1175484A1 Computer-controlled portable spin echo nmr instrument and method of use |
| 10/02/1984 | CA1175483A1 Computer-controlled portable pulsed nmr instrument |
| 10/02/1984 | CA1175482A1 Computer-controlled portable pulsed nmr instrument and method of use |
| 09/26/1984 | EP0119708A2 Electromagnetic surveying of pipes and cables |
| 09/25/1984 | US4473800 Method for detecting magnetotelluric subsurface anomalies |
| 09/25/1984 | US4473799 Apparatus for detecting presence of metal strand in paper |
| 09/25/1984 | US4472884 Borehole azimuth determination using magnetic field sensor |
| 09/25/1984 | CA1175106A1 Method and apparatus for extending lateral range electrical conductivity logging |
| 09/25/1984 | CA1175105A1 Process and apparatus for geotechnic exploration |
| 09/25/1984 | CA1175104A1 Exploration method using electron spin resonance signals from hydrocarbon crude |
| 09/19/1984 | EP0119000A1 Coin discriminating apparatus |
| 09/18/1984 | US4472706 Vehicle presence loop detector |
| 09/18/1984 | US4472684 For the electrical investigation of earth formations traversed by boreholes |
| 09/11/1984 | US4471436 Phasor processing of induction logs including shoulder and skin effect correction |
| 09/11/1984 | US4471307 Amplitude modulated resistivity logging system |
| 09/11/1984 | CA1174276A1 Method of determining the location of a deep-well casing by magnetic field sensing |
| 09/04/1984 | US4470015 Metal detector system with undesirable target and mineralized ground discrimination |
| 09/04/1984 | CA1173931A1 Magnetic surveillance system with odd-even harmonic and phase discrimination |
| 08/28/1984 | US4468623 Method and apparatus using pad carrying electrodes for electrically investigating a borehole |
| 08/22/1984 | EP0116116A2 Lift-off compensation of eddy current probes |
| 08/21/1984 | US4467425 Deconvolution filter for induction log processing |
| 08/21/1984 | US4467283 Electrical geophysical exploration system with addressable current probes |
| 08/21/1984 | US4467274 Electrical surveys of underwater or underground structures with electrode-to-electrolyte potential correction |
| 08/21/1984 | US4466543 Method and device for distinguishing between field crops, particularly potatoes on one hand and stones or clods of soil on the other hand |
| 08/16/1984 | WO1984003153A1 Device in a hydrophone cable for marine seismic surveys |
| 08/15/1984 | EP0115913A1 Variable frequency induction well logging method and apparatus |
| 08/14/1984 | US4465140 Method for the magnetization of well casing |
| 08/14/1984 | US4464930 Method for identifying complex lithologies in a subsurface formation |
| 08/07/1984 | US4464622 Electronic wall stud sensor |
| 08/07/1984 | CA1172206A1 Method and device for distinguishing between field crops, particularly potatoes on one hand and stones or clods of soil on the other hand |
| 08/01/1984 | EP0114728A2 Method and apparatus for deconvolving apparent conductivity measurements in induction well logging |
| 07/31/1984 | CA1171908A1 Method and apparatus for detecting a conductive mineral |
| 07/25/1984 | EP0113736A1 A method and apparatus for determining the trace and depth of underground metallic conductors. |
| 07/25/1984 | EP0014204B1 Metal type detector for drill pipes |
| 07/24/1984 | US4461997 Non-conductive logging sonde housing |
| 07/24/1984 | CA1171493A1 Proximity switch |
| 07/10/1984 | US4459561 Phase-lock loop controlled object detector oscillator |
| 07/10/1984 | US4458767 Method for directionally drilling a first well to intersect a second well |
| 07/03/1984 | US4458205 Geomagnetic prospecting method with measurements obtained during an internal of one to ten minutes time duration |
| 07/03/1984 | US4458204 Frequency dependent pulsed gain modulated concealed structure locator |
| 06/19/1984 | US4455529 Digital induction logging tool including means for measuring phase quadrature components in a phase sensitive detector |
| 06/19/1984 | CA1169525A1 Surveillance system employing a floor mat radiator |
| 06/13/1984 | EP0110750A2 Method and apparatus for producing an image log of a borehole wall penetrating an earth formation |
| 06/12/1984 | CA1169136A1 Article theft detection |
| 05/29/1984 | US4451812 Electrostatic shield |
| 05/29/1984 | US4451790 Spontaneous potential log apparatus with randomly occurring noise cancellation |
| 05/29/1984 | US4451789 For measuring parameters in the environment sorrounding a borehole |
| 05/29/1984 | CA1168309A1 Multiple-array induction logging tool |
| 05/29/1984 | CA1168308A1 Geophysical transmitting loop |
| 05/23/1984 | EP0108903A2 Universal interface method and apparatus for subsurface earth formation testing |
| 05/23/1984 | EP0108902A2 Method and apparatus for obtaining high resolution subsurface geophysical measurements |
| 05/22/1984 | CA1167922A1 Method and apparatus for conducting ground magnetic surveys |
| 05/15/1984 | US4449122 Proximity detector employing a crystal oscillator |
| 05/15/1984 | US4449115 Apparatus for detecting ferromagnetic material |
| 05/15/1984 | US4449099 Recording decimated magnetotelluric measurements with coherence |
| 05/15/1984 | US4449098 Arrangement for detecting the location of an electrically insulative continuous item positioned underground |
| 05/08/1984 | CA1167125A1 Coaxial cable for oil exploration |
| 05/08/1984 | CA1167103A1 Geomagnetic prospecting system and method |
| 05/01/1984 | US4446434 Hydrocarbon prospecting method with changing of electrode spacing for the indirect detection of hydrocarbon reservoirs |
| 05/01/1984 | US4446433 Apparatus and method for determining directional characteristics of fracture systems in subterranean earth formations |
| 05/01/1984 | US4445501 Circuits for determining very accurately the position of a device inside biological tissue |
| 05/01/1984 | CA1166695A1 Magnetic contamination detector |
| 04/18/1984 | EP0105801A2 Well logging apparatus and method using transverse magnetic mode |
| 04/17/1984 | US4443762 Method and apparatus for detecting the direction and distance to a target well casing |
| 04/17/1984 | US4443275 Soldewring, filling synthetic plates |
| 04/17/1984 | CA1165817A1 Balanced search loop for metal detector |
| 04/17/1984 | CA1165816A1 Apparatus for geophysical exploration |
| 04/12/1984 | WO1984001439A1 Apparatus and method for logging wells while drilling |
| 04/10/1984 | CA1165392A1 Method of automatic geologic interpretation |
| 04/04/1984 | EP0104854A2 Method for the magnetization of well casing |
| 03/29/1984 | WO1984001189A1 Well logging apparatus and method for making same |
| 03/28/1984 | EP0103972A2 Method for identifying complex lithologies in a subsurface formation |
| 03/27/1984 | US4439831 Digital induction logging system including autocalibration |
| 03/27/1984 | US4439734 Metal object locator including frequency shift detector |
| 03/20/1984 | US4438401 System for detecting a cable buried under the seabed |
| 03/20/1984 | US4438391 Electrical survey apparatus and method with spinner-type conductor supply |
| 03/20/1984 | US4438389 Method for utilizing three-dimensional radiated magnetic field gradients for detecting serving faults in buried cables |
| 03/14/1984 | EP0102665A2 Metal detector apparatus |
| 03/13/1984 | US4437064 Apparatus for detecting a magnetic anomaly contiguous to remote location by squid gradiometer and magnetometer systems |
| 03/07/1984 | EP0102091A2 Electromagnetic logging apparatus |
| 03/06/1984 | CA1163344A1 Detection of articles in adjacent passageways |
| 02/28/1984 | US4433528 For protecting rotatable machine elements in harvesting machines |
| 02/28/1984 | CA1162987A1 Method and means for detecting magnetic deposits in heat exchanger and the like |
| 02/21/1984 | CA1162624A1 Device for locating in buildings the exact position of hidden objects |
| 02/15/1984 | EP0100324A1 A system for localizing laid cables or pipes. |
| 02/14/1984 | US4431964 Method for determining a natural current flow in well casing |